This research focuses on leaching low nickel matte through sulfuric acid under atmospheric pressure, in which the Ni/Fe/Co enter into solution, noble elements and Cu_2S remain in the residue and the sulfur in Ni/Fe/Co sulfide is converted to H_2S. The subsequent process can be divided into three parts: (1) Fe in the solution can be removed by forming hematite or goethite and Ni/Co can be separated by organophosphorus extractants; (2) the noble elements and Cu_2S can be further treated in copper smelting process; and (3) H_2S can be transformed into elemental sulfur by Claus process. Compared with pyrometallurgy for copper-nickel sulfide ores, this method has advantages, such as low equipment requirement of atmospheric leaching, high recovery for noble elements and cobalt, convenient storage of sulfur than sulfuric acid and producing nickel sulfate that can be directly used in ternary materials. The whole process achieves the comprehensive utilization of low nickel matte with technical and economic benefits.
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机译:该研究侧重于在大气压下通过硫酸浸出低镍锍,其中Ni / Fe / Co进入溶液,贵巴元素和Cu_2s在残余物中,Ni / Fe / Co硫化物中的硫转化为H_2S。随后的方法可以分为三个部分:(1)溶液中的Fe可以通过形成赤铁矿或鹅料,Ni / Co可以通过有机磷萃取剂分离; (2)可以在铜冶炼过程中进一步处理贵族元件和Cu_2s; (3)H_2S可以通过克劳斯工艺转化为元素硫。与铜镍硫化镍矿石的Pyrome冶金相比,该方法具有优点,如低设备浸出的设备要求,高贵元素和钴的高回收,比硫酸的储存方便,生产可直接用于三元的硫酸盐材料。整个过程实现了具有技术和经济效益的低镍哑光的综合利用。
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